74HC138-Q100 データシートの表示（PDF） - NXP Semiconductors.
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74HC138-Q100 Datasheet PDF : 18 Pages
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NXP Semiconductors
74HC138-Q100; 74HCT138-Q100
3-to-8 line decoder/demultiplexer; inverting
Table 7. Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Figure 8.
Symbol Parameter Conditions
Tamb = 25 C
Tamb = 40 C
to +85 C
Tamb = 40 C
to +125 C
Min Typ Max Min Max Min
Max
For type 74HCT138-Q100
tpd
propagation An to Yn; see Figure 6
[1]
delay
VCC = 4.5 V
-
20 35
-
44
-
53
VCC = 5 V; CL = 15 pF
-
17
-
-
-
-
-
E3 to Yn; see Figure 6
[1]
VCC = 4.5 V
-
18 40
-
50
-
60
VCC = 5 V; CL = 15 pF
-
19
-
-
-
-
-
En to Yn; see Figure 7
[1]
VCC = 4.5 V
-
19 40
-
50
-
60
VCC = 5 V; CL = 15 pF
-
19
-
-
-
-
-
tt
transition Yn; see Figure 6 and
[2]
time
Figure 7
VCC = 4.5 V
-
7 15
-
19
-
22
CPD
power
CL = 50 pF; f = 1 MHz;
[3] -
67 -
-
-
-
-
dissipation VI = GND to VCC
capacitance
Unit
ns
ns
ns
ns
ns
ns
ns
pF
[1] tpd is the same as tPLH and tPHL.
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in W).
PD = CPD VCC2 fi N + (CL VCC2 fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
(CL VCC2 fo) = sum of outputs.
74HC_HCT138_Q100
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 16 July 2012
© NXP B.V. 2012. All rights reserved.
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